Scale guard



Dec. 29 1925- 2 F. c. BIGGERT, JR

SCALE GUARD Filed Jan. 6, 1925 1 10.3. 9 FIG-5- Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE FLORENCE C. BIGGEBT, 33., F PITTSBURGH, PENNSYLVANIA, ASSIGNOB TO UNITED ENGINEERHTG & FOUNDRY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A GOR- IPORATION OF PENNSYLVANIA.

SCALE GUARD.

Application filed January 6, 1925. Serial no. 927.

venting the passage of slag or other foreign material to the roll bearings.

It has heretofore oeen customary in the art to which the present invention relates to provide the lower roll of a rolling mill with a supplemental groove adjacent each of the roll necks adapted to cooperate with 2 the down turned lip of a scale guard to prevent the passage of scale or other foreign material into the roll bearing.

. In heavy mills, the roll spring makes it desirable to make the rolls as short as possible while providing suflioient area for the work to be accomplished. It will be appreciated that the provision of supplemental grooves under such conditions are objection-' able. Even with smaller mills, the construction as'heretofore used has represented a waste due to the increased length of the roll and the necessity of turning the guard groovetherein. I v In accordance with the present inventio there is provided a scale guard efi'ectively cooperating directly with the 'end of. a roll and automaticaly held in contact therewith in such manner as to maintain at all times a seating relation between the guard and the roll.

In the accompanying drawings there is V shown for purposes of illustration only a preferred embodiment of the present invention, it being understood that the drawings do not define the limits of my invention and that changes in the construction and the operation therein disclosed may be made without departing either from the spirit of the invention or the scope of my broader claims.

In the drawings: 7 Figure 1 is an end elevation of a portion of a rolling mill showing my improved guard in position on the lower roll;

means cooperating therewith, and especially with the necks of the lower rolls for pre-' Figure 2 is a vertical sectional view through a portion of the mill show in Figure 1;

Figure 3 is a side elevation, on an enlarged scale, of the improved scale guard;

Figure 4 is a longitudinal section through the guard; V

Figure 5 is an end elevation of the guard looking toward the left hand end as viewed in Figure 3, and V Figure 6'is an end elevation looking toward the opposite end of the guard.

It has heretofore not been uncommon practice in the art of rollingmills to provide a substantially U-shaped bearing for the lower roll. This bearing being open at its top must be shielded in order to prevent the access of objectionable forei material thereto. By the present invention, advantage is taken of this general type of bearing and of the force of gravity for making possible the use of a scale guard which eliminates. the necessity of extra long rolls and makes possible a sealing venting the passage 0 material to the bearings.

In carrying out the present invention there may be provided a suitable roll housing 2 having provision for a U-shaped or open top bearing 3 for the lower roll. The upper edges of this hearing on each side of the rollare sha ed to provide ledges 4 facing the roll nec 5. As illustrated in Figany objectionable ure 2 the upper edges of the bearing 3 are 7 and the guard whereby the parts are maintained in the desired assembled relationship. These edges are also of gradually decreas ing heightas clearly shown in igure 3, the angle of inclination preferably corresponding tothat of the upper edges of the bearings 3. Dueto this construction, the

' main body of the scale guard will be supfit effectively preported in substantially horizontal position,

or in concentric relationship to the roll neck when mounted on the bearing, the entire guard being supported however on an-inclinedsurface in such manner that it tends to move inwardly a ainst the shoulder 6. This tendency is assisted by the jars incident to the operation of a mill.

The end of the guard ada ted to contact with the shoulder 6 is forum with a thickened upwardly projecting flange 9 providing a substantial area of contact between the roll and the guard and also roviding suflicient metal whereby the operation of the mill will grind an accurate seat between the guard and the roll.

While the accompanying drawings illustrate a preferred embodiment for taking advantage of the force of gravity and the jarring of the mill for providing the desired sealing it will be apparent that these advantages may be obtained by other embodiments involving the use of guards so mounted that they tend to move toward the center of the roll stand during the opera-- tion of the mill.

. The advantages of the present invention tional advantages of the present invention are obtained by reason of this construction.

I claim:

1. Ina rolling a roll bearing, and a scale guard cooperating therewith, said 4 guard being constructed to move axially of theroll bearing durin the operation of the mill, substantially as escribed.

2. In a rolling mill a roll bearing, a scale guard cooperating therewith, and means causing said scale guard to tend to move axially of the roll bearing, substantially as described.

3. In a rolling mill a roll bearing, and a scale and cooperating therewith said guard eing constructed whereby it 1s normally urged in a predetermined direction substantially lengthwise of the roll by the force of gravity, substantially as described.

4. In a mill, a bearing, and a scale guard for said bearing having longitudinally clined supporting means therefor, substantially as described. I

5. As an article of manufacture, an improvedscale guard for bearings comprising a body portion having longitudinally inclined supporting means therefor, substantially as described.

6. In a mill, a bearing having longitudinally inclined upper edges, and a scale guard cooperating with said inclined edges and longitudinally movable thereon, substantially as described.

7. In a mill, a bearing having longitudinally inclined upper edges, and a scale guard cooperating with said inclined edges and movable thereon, said guard also having longitudinally inclined supporting edges cooperating therewith, substantially 'as described.

In testimony whereof I have hereunto set my hand.

FLORENCE C. BIGGERT, JR. 

